Commit d69ae81e authored by Fenglin Wu's avatar Fenglin Wu Committed by Sebastian Reichel
Browse files

power: supply: core: Add resistance power supply property 



Some battery drivers provide the ability to export internal resistance
as a parameter. Add internal_resistance power supply property for that
purpose.

Signed-off-by: default avatarFenglin Wu <fenglin.wu@oss.qualcomm.com>
Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
parent 1bafaa15

Documentation/ABI/testing/sysfs-class-power

+16 −0
Original line number Diff line number Diff line
@@ -553,6 +553,22 @@ Description: 
			Integer > 0: representing full cycles

			Integer = 0: cycle_count info is not available



What:		/sys/class/power_supply/<supply_name>/internal_resistance

Date:		August 2025

Contact:	linux-arm-msm@vger.kernel.org

Description:

		Represent the battery's internal resistance, often referred

		to as Equivalent Series Resistance (ESR). It is a dynamic

		parameter that reflects the opposition to current flow within

		the cell. It is not a fixed value but varies significantly

		based on several operational conditions, including battery

		state of charge (SoC), temperature, and whether the battery

		is in a charging or discharging state.



		Access: Read



		Valid values: Represented in microohms



**USB Properties**



What:		/sys/class/power_supply/<supply_name>/input_current_limit

drivers/power/supply/power_supply_sysfs.c

+1 −0
Original line number Diff line number Diff line
@@ -223,6 +223,7 @@ static struct power_supply_attr power_supply_attrs[] __ro_after_init = { 
	POWER_SUPPLY_ATTR(MANUFACTURE_YEAR),

	POWER_SUPPLY_ATTR(MANUFACTURE_MONTH),

	POWER_SUPPLY_ATTR(MANUFACTURE_DAY),

	POWER_SUPPLY_ATTR(INTERNAL_RESISTANCE),

	/* Properties of type `const char *' */

	POWER_SUPPLY_ATTR(MODEL_NAME),

	POWER_SUPPLY_ATTR(MANUFACTURER),

include/linux/power_supply.h

+1 −0
Original line number Diff line number Diff line
@@ -176,6 +176,7 @@ enum power_supply_property { 
	POWER_SUPPLY_PROP_MANUFACTURE_YEAR,

	POWER_SUPPLY_PROP_MANUFACTURE_MONTH,

	POWER_SUPPLY_PROP_MANUFACTURE_DAY,

	POWER_SUPPLY_PROP_INTERNAL_RESISTANCE,

	/* Properties of type `const char *' */

	POWER_SUPPLY_PROP_MODEL_NAME,

	POWER_SUPPLY_PROP_MANUFACTURER,